tear gland
Quick Summary
The tear glands, also known as lacrimal glands, are structures responsible for producing the watery component of tears. Tears are essential for keeping the eye's surface moist, providing nutrition and oxygen, and possessing antibacterial properties.
Tears consist of a complex fluid, with an inner mucous layer and an outer lipid layer that prevent evaporation and help tears adhere to the eye. Tears are secreted by both accessory lacrimal glands and the main lacrimal glands, which are almond-shaped and located above and to the outer side of the eye.
Tears drain from the eye through small openings called puncta, into the lacrimal sacs, and then into the nasal cavity via the nasolacrimal duct. Diseases affecting the lacrimal glands can lead to chronic dry eye, potentially threatening vision.1234
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human nervous systemParasympathetic nervous systemThese include the lacrimal gland, which supplies tears to the cornea of the eye; salivary glands (sublingual, submandibular, and parotid glands), which produce saliva; and nasal mucous glands, which secrete mucus throughout the nasal air passages. The parasympathetic preganglionic neurons that regulate these functions originate in the reticularā¦
Read MoreThese include the lacrimal gland, which supplies tears to the cornea of the eye; salivary glands (sublingual, submandibular, and parotid glands), which produce saliva; and nasal mucous glands, which secrete mucus throughout the nasal air passages. The parasympathetic preganglionic neurons that regulate these functions originate in the reticularā¦
Read More- parasympathetic nervous system
ā¦under parasympathetic control include the lacrimal gland, which supplies tears to the cornea of the eye; the salivary glands, which produce saliva; and the nasal mucous glands, which secrete mucus throughout the nasal air passages.
Read Moreā¦under parasympathetic control include the lacrimal gland, which supplies tears to the cornea of the eye; the salivary glands, which produce saliva; and the nasal mucous glands, which secrete mucus throughout the nasal air passages.
Read More